/* 容器固定在右下角 */
.fab-container {
    position: fixed;
    bottom: 32px;
    right: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    z-index: 10;
}

/* 基础 FAB 样式 */
.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-family: Arial, sans-serif;
    font-size: 18px;
    color: #fff;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
}

/* 悬停效果 */
.fab:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
}

/* 点击反馈 */
.fab:active {
    transform: scale(0.95);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* 不同颜色 */
.fab-blue {
    background: #1976d2;
}
.fab-green {
    background: #2ecc71;
}
.fab-red {
    background: #e74c3c;
}